Latent Load Research Articles

Climatic division for the design of HVAC systems

Different climate characteristics put forward different requirements for the performance of air conditioning system. Climatic division has been proposed to facilitate the selection or design of HVAC systems to match indoor cooling/heating loads of buildings better. However, humidity parameter and distinction of sensible and latent loads are usually ignored, bringing problems to the operation and control of HVAC systems. Therefore, this study proposed a novel climatic division method for China during the cooling period taking the coupling effect of cooling and dehumidification of HVAC systems into account. The humidity-based cooling degree-day was firstly taken as an index to evaluate the influence of outdoor humidity parameter. Then, 96 cities, whose cooling loads are particularly affected by the humidity, were selected for further analysis. Indoor cooling loads were calculated using EnergyPlus and the climatic division based on sensible heat ratio and total cooling load was presented. Finally, on the basis of the novel climatic division, hourly sensible cooling load and latent cooling load of representative cities in each zone were analyzed to get the characteristics of load boundary and frequency distribution. A new design method was therefore proposed and discussed, paving a new way for the customized design of HVAC systems for each climate zone.

Influence of the moisture driving force of moisture adsorption and desorption on indoor hygrothermal environment and building thermal load

To more accurately evaluate the indoor hygrothermal environment of a building, control the indoor temperature and humidity, evaluate the thermal comfort of occupants, and select the capacity of the heating, ventilation, and air conditioning (HVAC) system, moisture transfer from and into architectural materials should be considered. However, the most widely used commercialized software ignores the moisture effect from envelopes or adopts a simplified model based on the difference in humidity ratios between hygroscopic materials and interior zone air. In this study, the effects of the driving forces of hygrothermal models were identified and quantified. The calculated results show that the indoor humidity changes differed when the moisture effect by moisture adsorption and desorption was considered in the models. Because the simplified effective moisture penetration depth (EMPD) model uses differences in the humidity ratio as a driving force, the calculated results of the indoor humidity ratio exhibit relatively constant tendencies. However, the thermodynamic chemical potential model corresponds to a detailed heat, air, and moisture transfer (HAM) model that uses the water potential as a driving force; this model can consider the moisture effect based on temperature and humidity changes. Therefore, the humidity ratios calculated using the detailed thermodynamic HAM model show differences of 0.01%–38.78%, and the difference in relative humidity between building materials and indoor air becomes smaller; these results are comparable to those of the simplified model. Finally, the adoption of a simplified model can result in differences in the sensible heat load of 4.4%–13.8% and latent heat load of 16.1%–51.2%. Thus, this study confirmed that a coupled HAM model, which uses the water potential as a driving force, can be employed to accurately simulate the hygrothermal behavior of building envelopes.

Study of mass transfer in liquid desiccant for dehumidifiers packed by using conventional wooden slats

To reduce electricity consumption, heating ventilation from the airconditioning sector focuses on developing alternative solution electrically-driven vapour-compression system. The liquid desiccant air-conditioning system represents energy efficiency. It is more environmentally friendly as an alternative technology for the dehumidification process, especially in cases with high latent loads to maintain air quality under reduced conditions for comfortable. This technology is more efficient than the vapour compression system in hot and humid climates like Indonesia. This study carries out an experimental investigation to find out how much moisture removal with using a liquid desiccant to absorb humidity in the air and to know general types of correlations for heat and mass transfer in the contactor for the air solution. In this experiment, liquid desiccant will be passed through wooden slats to determine the physical and thermophysical properties of the air. The general equation will be verified by the experimental results using a curve that fits this expected. The result is a decrease in the humidity in the air. It is known from the amount of moisture absorbed by the drying liquid, and the highest is 336.49 g / s and the lowest is 19 g / s. So it can be concluded that the drying liquid that is exposed to air and passing through wooden slats effective removes moisture.

An exergy analysis and parameter optimization of solid desiccant heat pumps recovering the condensation heat for desiccant regeneration and heat transfer enhancement

Solid desiccant is subjected to remove extra humidity from unsaturated air once thermally regenerated and then sufficiently cooled down. Therefore, it can be incorporated into the traditional vapor compression (VC) systems to handle the latent heat load with elevated evaporation temperature. The condensation heat can be recovered to regenerate the desiccant periodically, with an extra bonus of overall heat transfer enhancement. Such system is named after solid desiccant heat pumps (SDHP), expectedly to deliver higher evaporation temperature and lower pressure ratio at the expenses of the periodical switchover, increased wind friction and slightly impaired sensible heat transfer performance due to the desiccant thermal resistance. To verify the feasibility and superiority of SDHPs, this article proposes a robust thermodynamic model to calculate the operational parameters in SDHPs, such as evaporation temperature, condensation temperature and electricity consumption, corresponding to specific application scenarios. An exergy analysis based on the calculated parameters then followed to identity the origin and destination of the exergy. It concludes that, SDHPs can recover the dehumidification capacity of desiccant by low-grade condensation heat (∼50 °C), with the transfer enhancement up to 120%. Meanwhile, the introduction of the solid desiccant will contribute to a 11%–169% improvement in coefficient of performance (COP) and a 52%–207% improvement in exergy efficiency, in spite of the exergy destruction by air-side friction (<5%) and switchover offset (<10%). Last but not least, for normally encountered latent heat ratio (0.2–0.5), desiccant with linear isotherms or with moderate stepwise position (35–45%) will surpass materials with earlier or later stepwise position.

Hybrid heat-pump-driven liquid-desiccant system: Experimental performance analysis for residential air-conditioning applications

A compact heat-pump-driven liquid-desiccant air-conditioning unit for residential buildings is proposed and constructed to validate its energy and air-conditioning performance experimentally. By composing the system with one set of providing the decoupled control of annual sensible and latent loads, the proposed system would contribute to the residential applicability as a packaged multi-functional air-conditioning system. The proposed system consists of a liquid-desiccant dehumidifier to accommodate the latent load and a heat-pump to meet the sensible load of the conditioned zone. The heat-pump also simultaneously accommodates the desiccant-solution cooling and heating demands required in the operation of the liquid-desiccant system. The operating and energy performances of the proposed system for representative summer and winter modes are monitored through a full-size test mock-up in a laboratory. The measurement data reveals that the proposed system can consistently maintain the target supply-air temperature and humidity in each operation mode. In terms of energy efficiencies, the proposed system exhibits an energy efficiency ratio of 7.72 for the summer and a coefficient of performance of 2.51 for the winter operating conditions, which satisfy the approved minimum efficiency requirements. In conclusion, the proposed system has a great application potential for residences in terms of operating and energy performances.

CFD ANALYSIS OF SOLAR OPERATED EARTHEN POTAIR COOLER

The present air-ventilation methods are evaporative coolers, air conditioning, fans. But running these products need high-rate electricity. The production of electricity is ultimately responsible for hot and humid conditions i.e., global warming. In hot and humid conditions, the need to feel relaxed and comfortable has become one of few needs and for this purpose utilization of systems like air-conditioning and refrigeration has increased rapidly. These systems are most of the time not suitable for villages due to longer power cut duration and the high cost of products. Solar power systems being considered as one of the paths towards more sustainable energy systems, considering solar cooling systems in villages would comprise of many attractive features. This technology can efficiently serve large latent loads and greatly improve indoor air quality by allowing more ventilation while tightly controlling humidity. Despite increasing performance and mandatory energy efficiency requirements, peak electricity demand is growing and there is currently no prevalent solar air-cooling technology suited to residential. This research CFD analysis of solar operated earthen pot air cooler for domestic applications. Velocity airflow within the Earthen Pot in that air velocity has been increased with reducing the pressure results the temperature variation. In Temperature contour the temperature rate reduces with 8 to 10 OC of room temperature and the analysis gives the temperature difference and air velocity variations.

Evaluating the dynamics of occupancy heat gains in a mid-sized airport terminal through agent-based modelling

The occupancy heat gains of airport terminal buildings are driven by the dynamics of passenger flow. In this paper, we evaluate the heat losses from the human body in a transient state to estimate the sensible and latent loads on the HVAC system. The study pertains to a mid-sized airport terminal building in a tropical wet and dry climate of India. The pattern of passenger movement, service time and discretionary activity choices are evaluated through field measurement and subjective surveys. The sequence of passenger movement, dwell time and occupancy profile at different zones for departure and arrival sequences are estimated through validated agent-based simulations. Transient heat losses from the human body are established through thermo-physiology simulations based on the occupancy dynamics. Hourly sensible and latent heat load profiles of different zones are deduced for different terminal operation periods. The evaporative heat losses from human body varies considerably during passenger transit resulting in significant latent heat gain differences among the zones. Despite lower activity levels in certain zones, latent heat loads from occupancy are higher because of preceding activity sequences. The sensible to latent heat load ratio varies from 0.7:0.3 to 0.52:0.48 across the zones during different operational periods.

Design of cascade analysis for renewable and waste heat recovery in a solar thermal regeneration unit of a liquid desiccant dehumidification system

Liquid desiccant dehumidification (LDD) system is an emerging technology with energy-saving benefit in HVAC applications. It removes moisture from the inlet air stream and handles the latent load without overcooling and reheating. The most energy-intensive process of the LDD system, the desiccant regeneration process, can be driven by renewable solar thermal energy with a temperature lower than 100 °C. However, the integration of solar heat needs to consider the inconsistent availability of solar radiation and regeneration heat demand.In this study, a pinch-based Cascade Analysis (CA) approach is used to optimally size the solar thermal collectors and thermal energy storage (TES) water tanks, which are the main components of the solar thermal system. From the analysis, the overall system efficiency, minimum area of solar thermal collectors and total TES volume are 78.8%, 59.83 m2 and 7.10 m3, respectively, with an average daily regeneration heat demand of 213.48 kWh. The overall system installation and operating cost is approximately 14219.98 USD or 948.00 USD annually over 15 years. This work serves as a preliminary study to provide an overview of the implementation of solar thermal systems for decision-makers who intend to implement solar-based LDD systems in HVAC or drying applications.

RNA-guided gene editing of the murine gammaherpesvirus 68 genome reduces infectious virus production.

Epstein-Barr virus (EBV) and Kaposi sarcoma herpesvirus (KSHV) are cancer-causing viruses that establish lifelong infections in humans. Gene editing using the Cas9-guideRNA (gRNA) CRISPR system has been applied to decrease the latent load of EBV in human Burkitt lymphoma cells. Validating the efficacy of Cas9-gRNA system in eradicating infection in vivo without off-target effects to the host genome will require animal model systems. To this end, we evaluated a series of gRNAs against individual genes and functional genomic elements of murine gammaherpesvirus 68 (MHV68) that are both conserved with KSHV and important for the establishment of latency or reactivation from latency in the host. gRNA sequences against ORF50, ORF72 and ORF73 led to insertion, deletion and substitution mutations in these target regions of the genome in cell culture. Murine NIH3T3 fibroblast cells that stably express Cas9 and gRNAs to ORF50 were most resistant to replication upon de novo infection. Latent murine A20 B cell lines that stably express Cas9 and gRNAs against MHV68 were reduced in their reactivation by approximately 50%, regardless of the viral gene target. Lastly, co-transfection of HEK293T cells with the vector expressing the Cas9-MHV68 gRNA components along with the viral genome provided a rapid read-out of gene editing and biological impact. Combinatorial, multiplex MHV68 gRNA transfections in HEK293T cells led to near complete ablation of infectious particle production. Our findings indicate that Cas9-gRNA editing of the murine gammaherpesvirus genome has a deleterious impact on productive replication in three independent infection systems.

Heat and moisture transfer of building envelopes under dynamic and steady-state operation mode of indoor air conditioning

Realizing dynamic thermal comfort can help improve building performance. The heat and moisture transfer of the envelope is an important part of building performance. Therefore, this paper takes a typical room in Shanghai as an example and uses simulation software WUFI-PLUS and DELPHIN to study the influence of dynamic/steady-state operation mode of indoor air conditioning on the heat and moisture transfer of the envelope structure. The results show that based on the same thermal comfort, the energy consumption of the full heat load in dynamic operation mode is 73.69% lower than that in steady-state operation mode at 0ACH night ventilation, and it is 65.10% lower at 5ACH night ventilation. And at the same night ventilation condition, the moisture flow through the wall in the dynamic operating mode is smaller than that in the steady-state operating mode. In the case of 0ACH, when the partial pressure difference of water vapor is positive, the moisture transfer capacity in the dynamic operation mode of the indoor thermal environment is 11.7% lower than that in the steady-state operation mode. Therefore, when the partial pressure difference of water vapor is positive, the dynamic change of the indoor thermal environment can reduce the latent heat load of the envelope under the same water vapor pressure difference.

열회수형 환기장치 적용 시 다중이용시설의 환기횟수에 따른 냉·난방부하와 감염률

Recently, confirmed patients of COVID-19 continue to occur in multi-use facilities, and cases of aerosol infection increase in non-ventilated spaces. As ventilation rate increases, the virus infection rate decreases exponentially, but forced ventilation for reducing the infection rate leads to energy loss. In this paper, a cafe was selected the same as the previous paper. TRNSYS18 was used to calculate the heating and cooling loads according to ventilation rates and methods. Based on this, the correlation with the infection rate was analyzed. During heating operation, the heating loads increased as ventilation rate increased, and the heating sensible loads were particularly affected. Ventilating with 3 ACH, the heating loads increased by 14 times for forced ventilation, compared to non-ventilated. Applying ERV, the heating loads increased by 3.5 and 3.3 times for the plate and rotary respectively. The cooling latent loads increased significantly as ventilation rate increased, compared to non-ventilated during cooling operation. Ventilating with 3 ACH, the cooling loads increased by 2 times for forced ventilation, 1.6 and 1.2 times for the plate and rotary respectively. When infected and non-infected people stay in the same space for 5 hours without wearing a mask, it is possible to keep the infection rate below 2% with 3 ACH. As a way to prevent the spread of COVID-19, ventilation is very effective, and considering energy savings, ERV introduction is essential.

Experimental and Statistical Analysis of Relative Humidity and Temperature of Moist Air in a Flat Plate Multi-Layer Desiccant Cooling System

ABSTRACT Sensible load and latent load are the two main factors for effective space air conditioning. In recent times, for comfort space air conditioning, several efforts have been made to drop the Relative Humidity (RH) and Temperature of the ambient moist air to meet the comfort conditions. In the present work, dehumidification of ambient processed air has been performed using a novel flat plate multi-layer liquid desiccant cooling system to achieve a comfortable environment for human beings. The experimental investigation has been performed to analyze the effects of operating parameters including processed air velocity, desiccant solution flow rates, and its concentration, relative humidity (RH) and temperature (T) of the ambient processed air. Response surface methodology has been implemented to execute the statistical modeling of the RH and T of the processed air during the dehumidification process. Analysis of variance (ANOVA) has been implemented at a confidence interval of 95% of process parameters (processed air velocity, desiccant solution flow rates, and solution concentration) on the responses (RH and T) of the processed air. Finally, few experiments were also performed to validate the developed model. It has been perceived that the value of output parameters decrease with decrease in processed air velocity and increase in solution concentration while these parameters increase with increase in solution flow rates. The results revealed that the relative humidity and temperature of the processed air reduced up to 12.8% (8.73 g/kg as humidity ratio) and 4.1◦C, respectively, in comparison to the inlet air conditions.

Study on heat transfer and dehumidification performance of desiccant coated microchannel heat exchanger

The desiccant coated heat exchanger is capable of dealing with sensible load and latent load of hot and humid air. The heat and moisture transfer coefficients of the desiccant coated microchannel heat exchanger (DMHE) are derived theoretically and increase with the airflow velocity in the heat exchanger. The microchannel structure optimization is implemented. It is found that the smaller the fin pitch and flat tube pitch are, the greater the heat and moisture transfer coefficients are. The thicker the desiccant coating, the larger the moisture transfer coefficient, the smaller the heat transfer coefficient. The experimental results show that the dehumidification capacity and the thermal performance coefficient of DMHE are 1.59 kgh−1 and 2.09 respectively with the regeneration hot water at 60 °C. The Taguchi method is employed to evaluate the influence of cooling water temperature, airflow velocity, and water flow rate on the dehumidification performance of DMHE. The airflow velocity is the main factor affecting the dehumidification capacity, where lower cooling water temperatures and faster the airflow velocity increases the dehumidification performance.

Transient analysis of an electric vehicle air-conditioning system using CO2 for start-up and cabin pull-down operations

Abstract The energy consumption during the start-up and cabin pull-down operation of an air-conditioning system (A/C) for electric cars was studied in this work. An entire system model consisting of a CO2 vapor compression system (VCS), air handling unit (AHU), and the cabin was established utilizing an acausal, object-oriented, and equation-based modeling platform. A previously validated model was adopted for the VCS. AHU and cabin models were established by paying attention to the latent heat load, humidity, and dehumidification. The models were validated against the data from three different studies. A set of transient simulations was carried out for the start-up and cabin pull-down operation periods. It is found that the initial temperature of the cabin significantly influences the energy consumption and pull-down time. When the cabin target temperature decreases from 25 °C to 21 °C, the compressor consumes 58% more energy, and the pull-down time increases by 23%. Increasing the initial temperature 35 °C to 55 °C leads to 150% longer pull-down time, and 289% more energy consumption. The initial RH of the cabin air has a negligible impact on the pull-down time, but affects energy consumption. Increasing the RH from 33% to 66% results in 9% energy consumption.

Potential of Latent Heat Load Removal by Activated Carbons for Energy Savings of Air Conditioning Systems

The study aims to achieve energy savings of air conditioning systems using desiccant dehumidification with low-cost adsorbent. For this purpose, two existing activated carbons were evaluated in terms of water adsorption capacity. The theoretical calculation of effective adsorption from the water adsorption isotherms revealed that the studied activated carbons have promising potential in dehumidification application. In addition to that, the improvement of cooling COP of air conditioners was predicted by simulation of heat pump cycle. The results showed that the COP improved by 50%, which was equivalent to the reduction of electricity input by 30%, with the raise of evaporation temperature from 8.5°C to 18.5°C. The results encouraged the separation of dehumidification load from air conditioners to achieve large energy savings.

Bromodomain proteins regulate human cytomegalovirus latency and reactivation allowing epigenetic therapeutic intervention

Reactivation of human cytomegalovirus (HCMV) from latency is a major health consideration for recipients of stem-cell and solid organ transplantations. With over 200,000 transplants taking place globally per annum, virus reactivation can occur in more than 50% of cases leading to loss of grafts as well as serious morbidity and even mortality. Here, we present the most extensive screening to date of epigenetic inhibitors on HCMV latently infected cells and find that histone deacetylase inhibitors (HDACis) and bromodomain inhibitors are broadly effective at inducing virus immediate early gene expression. However, while HDACis, such as myeloid-selective CHR-4487, lead to production of infectious virions, inhibitors of bromodomain (BRD) and extraterminal proteins (I-BETs), including GSK726, restrict full reactivation. Mechanistically, we show that BET proteins (BRDs) are pivotally connected to regulation of HCMV latency and reactivation. Through BRD4 interaction, the transcriptional activator complex P-TEFb (CDK9/CycT1) is sequestered by repressive complexes during HCMV latency. Consequently, I-BETs allow release of P-TEFb and subsequent recruitment to promoters via the superelongation complex (SEC), inducing transcription of HCMV lytic genes encoding immunogenic antigens from otherwise latently infected cells. Surprisingly, this occurs without inducing many viral immunoevasins and, importantly, while also restricting viral DNA replication and full HCMV reactivation. Therefore, this pattern of HCMV transcriptional dysregulation allows effective cytotoxic immune targeting and killing of latently infected cells, thus reducing the latent virus genome load. This approach could be safely used to pre-emptively purge the virus latent reservoir prior to transplantation, thereby reducing HCMV reactivation-related morbidity and mortality.

Energy-efficient sorption-based gas clothes dryer systems

Standard electric resistance and fuel-driven dehydration technologies exhibit a maximum coefficient of performance of well below 1 mainly due to enthalpy losses associated with the air leaving the dehydration system. To improve energy efficiency, condensing dryer systems condense the moisture captured from a product in a closed-loop air circulation cycle. Existing condensing dehydration systems including heat pump dryers, however, need to significantly cool the air to achieve dehumidification. The added cooling and subsequent heating to return the air to a desired drying temperature consume substantial energy and thus reduce drying performance. Here, an innovative sorption-based gas dehydration system is proposed to overcome barriers deteriorating energy efficiency in existing gas, electric, or heat pump dryer systems. Decoupling latent and sensible loads, the system employs a liquid-desiccant solution to directly capture air humidity, thereby allowing circulation of the air in a closed loop to achieve high drying energy efficiency. In other words, the system captures waste latent heat from the moisture produced during the dehydration process and reuses it to improve energy efficiency. This study focuses on a comprehensive quasi-steady-state thermodynamic modeling of the proposed sorption-based dehydration concept employed for a gas clothes dryer application to predict transient response and overall drying performance (i.e., time and energy metrics). The analysis indicates the proposed sorption-based gas clothes dryer system can deliver a specific moisture extraction rate of 1.71 kg of water per kWh (i.e., a combined energy factor of 3.167 kg (6.98 lbm) of dry cloth per kWh) with a drying time of 44 min. This is a 112% energy improvement compared with state-of-the-art gas clothes dryers exhibiting a combined energy factor of 1.50 kg (3.3 lbm) of dry cloth per kWh. The technology pursued here can potentially be employed as a platform for many fuel-driven equipment to take advantage of available waste thermal energy in the environment instead of simply burning a fuel.

Allostatic load scoring using item response theory

Allostatic load is commonly operationalized using a sum-score of high-risk biomarkers. However, this method implies that biomarkers contribute equally to allostatic load, as each is given equal weight. Our goal in this methodological paper is to evaluate this, and complementarily, to identify biomarkers that are most informative and least informative for developing an allostatic load index. Item response theory models provide an alternate approach to calculating the allostatic load score, by treating individual biomarkers (e.g. “items”) as indicators of a latent allostatic load construct. Item response theory scores account for the data-driven discriminating power of each biomarker, and an individual’s pattern of biomarker responses. To demonstrate feasibility of this approach, we used data from the 2015–2016 National Health Examination and Nutrition Survey (NHANES; N ​= ​3751), with twelve allostatic load biomarkers representing immune response, metabolic function and cardiovascular health. Item response theory models revealed that body-mass-index and C-reactive protein were the most informative biomarkers for allostatic load. Both higher allostatic load sum-score and allostatic load item response theory score were associated with lower socio-economic status (p ​= ​0.008; p<0.001, respectively). Further, both formulations of allostatic load were positively associated with a nine-item depression screener (p<0.001 for both), but only the item response theory score was also positively associated with the impact of depressive symptoms on daily life (p ​= ​0.045). Item response theory scores may be more finely tuned to tease out effects, compared to sum-scores, and also provide more flexibility when there are missing biomarker measurements. Supplemental R code for our approach are included.

Automated laboratory load-based testing and performance rating of residential cooling equipment

In the U.S., with about 64% of primary occupied homes having unitary air conditioners, a small improvement in the energy efficiency of residential cooling equipment can lead to significant energy savings. Currently, standardized equipment energy efficiency rating is based on standard AHRI 210/240, that provides a metric for comparing the performance of different equipment. However, it is generally recognized that this approach fails to appropriately rate and credit equipment with advanced controls and variable-speed components. Contrarily, a load-based testing and rating approach is presented in this paper that can capture equipment performance with its integrated controls that is more representative of the field. In this approach, representative building sensible and latent loads are emulated in a psychrometric test facility at different indoor and outdoor test conditions utilizing a virtual building model. The indoor test room conditions are continuously adjusted to emulate the dynamic response of the virtual building to the test equipment sensible and latent cooling rates and the equipment dynamic response is measured. Moreover, an automated testing procedure is presented along with convergence criteria for measuring equipment steady-periodic performance. Climate-specific cooling seasonal performance ratings can be determined by propagating the coefficient of performance (COP) from load-based testing results through a temperature-bin method to estimate a seasonal COP (SCOP). In this work, the proposed approach was implemented to test and rate a variable-speed residential heat pump. Furthermore, the sensitivity of load-based testing results to virtual building parameters was investigated. Finally, repeatability results from the load-based testing approach are presented.

Experimental investigation on performance of desiccant coated microchannel heat exchangers under condensation conditions

Desiccant coated heat exchanger (DCHE), which can be adopted to construct a solar cooling system or desiccant heat pump system, can realize both sensible and latent load removal to provide comfortable supply air. Although it is difficult to avoid condensation in a practical application, the condensation condition of DCHEs is rarely studied. In this paper, a series of condensation experiments are carried out on the desiccant coated microchannel heat exchanger (DCMHE) under conditions with high temperature and high humidity ratio. First, by changing the temperature of cooling water, the unique dynamic characteristics of condensation different from non-condensing conditions are discussed, and the influence of desiccant coating is analyzed. Then, the parametric effects of inlet air velocity and fluid temperature on the mass transfer, heat transfer, and pressure drop performance of DCMHE are analyzed. The results show that the changing trend of the dynamic curve can be used as a sign to judge whether condensation exists or not. And the performance of DCMHE is still stable under continuous condensation conditions, which is not affected by the condensation water. In the dehumidification stage, the condensation dehumidification is dominant. In the aspect of parametric analysis, with the velocity of inlet air increasing from 0.5 m/s to 2.4 m/s, the average moisture removal in a cycle period ΔdDE,ave of DCMHE reduces by 40%, while the dehumidification results per unit time air ΔMDE of DCMHE increases by 192%. The optimal inlet air velocity range is 1.5 m/s–2.4 m/s, considering the dehumidification and heat recovery efficiency synthetically. Due to the thermal resistance of desiccant coating, total cooling load, the effectiveness of heat exchanger, and NTU of DCMHE is about 31%, 27%, and 26% lower than that of MHE. And the effect of desiccant coating on heat transfer performance is comparatively small at high wind speed. The experimental results are expected to provide a reference for the system design of desiccant coated heat exchangers.